Disable bwc preparing to backport of#37977, #37857 and #37872 (#38126)

Author: bleskes

build.gradle

@@ -160,7 +160,7 @@ task verifyVersions {
  * after the backport of the backcompat code is complete.
  */
 final boolean bwc_tests_enabled = false
-final String bwc_tests_disabled_issue = "https://github.com/elastic/elasticsearch/pull/38180" /* place a PR link here when committing bwc changes */
+final String bwc_tests_disabled_issue = "backport of#37977, #37857 and #37872" /* place a PR link here when committing bwc changes */
 if (bwc_tests_enabled == false) {
   if (bwc_tests_disabled_issue.isEmpty()) {
     throw new GradleException("bwc_tests_disabled_issue must be set when bwc_tests_enabled == false")